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Rel. frost
Last spring frost (0°C) 17 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 179 days 17 Apr – 13 Oct
Probability that frost is over

10% = Half of years are frost-free by this date. More about frost & season →

Custom date

Vegetables

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Cauliflower
Brassica oleracea (Botrytis-gruppen)
27 Feb – 13 Mar
14 Jun
5-7 wk
17 Apr
19 Jul
0 wk
21 Apr
9 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
6 – 20 Mar
26 Jun
4-6 wk
17 Apr
24 Jul
0 wk
21 Apr
14 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
7 Feb – 7 Mar
8-12 wk
2 May
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
27 Feb – 13 Mar
9 Jun
5-7 wk
17 Apr
14 Jul
0 wk
17 Apr
4 Jul
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
4 – 11 Apr
4 May
3-4 wk
2 May
25 May
2 wk after
Florence Fennel
Foeniculum vulgare
25 Apr – 2 May
6 Jun
4-5 wk
30 May
4 Jul
6 wk after
5 Jun
24 Jun
7 wk after
Butter bean
Phaseolus lunatus
Season too short
7 – 14 May
3-4 wk
4 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
23 Jan – 20 Feb
30 Mar
8-12 wk
17 Apr
25 May
0 wk
8 May
15 May
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
21 Apr
14 Jun
1 wk after
21 Apr
4 Jun
1 wk after
Maize
Zea mays
Greenhouse
21 – 28 Mar
24 Apr
3-4 wk
18 Apr
15 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
28 Mar – 4 Apr
3 Jul
3-4 wk
25 Apr
24 Jul
1 wk after
8 May
14 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
17 Apr
4 Jul
0 wk
17 Apr
24 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
27 Feb – 13 Mar
9 Jun
5-7 wk
17 Apr
14 Jul
0 wk
17 Apr
4 Jul
0 wk
Potato
Solanum tuberosum
22 Mar – 5 Apr
29 May
4-6 wk
3 May
26 Jun
2 wk after
3 May
16 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
27 Feb – 13 Mar
19 Jun
5-7 wk
17 Apr
24 Jul
0 wk
21 Apr
14 Jul
1 wk after
Pumpkin
Cucurbita pepo
Fleece
16 – 23 Apr
9 May
3-4 wk
14 May
30 May
4 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
28 Mar – 4 Apr
8 Jun
3-4 wk
25 Apr
29 Jun
1 wk after
8 May
19 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
6 – 20 Mar
21 Jun
4-6 wk
17 Apr
19 Jul
0 wk
Lettuce
Lactuca sativa
20 – 27 Mar
8 Jul
3-4 wk
17 Apr
29 Jul
0 wk
21 Apr
19 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
6 – 20 Mar
21 Jun
4-6 wk
17 Apr
19 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
20 Mar – 3 Apr
31 May
2-4 wk
17 Apr
14 Jun
0 wk
17 Apr
4 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
21 Apr
14 Jun
1 wk after
21 Apr
4 Jun
1 wk after
Spinach
Spinacia oleracea
20 – 27 Mar
23 Jul
3-4 wk
17 Apr
13 Aug
0 wk
13 Apr
3 Aug
1 wk before
Sweet potato
Ipomoea batatas
19 May – 2 Jun
4-6 wk
30 Jun
11 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
21 Feb – 7 Mar
3 Apr
6-8 wk
18 Apr
15 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
4 – 18 Apr
11 May
2-4 wk
2 May
25 May
2 wk after
22 May
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
6 – 20 Mar
21 Jun
4-6 wk
17 Apr
19 Jul
0 wk
Garden pea
Pisum sativum
20 – 27 Mar
23 Jun
3-4 wk
17 Apr
14 Jul
0 wk
21 Apr
4 Jul
1 wk after

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
Fleece
2 – 16 Apr
17 Apr
4-6 wk
14 May
15 May
4 wk after
Lemon balm
Melissa officinalis
6 – 20 Feb
19 May
8-10 wk
17 Apr
14 Jul
0 wk
22 May
4 Jul
5 wk after
Dill
Anethum graveolens
21 Apr
24 Jul
1 wk after
Wild chives
Allium schoenoprasum
20 Feb – 6 Mar
2 Jun
6-8 wk
17 Apr
14 Jul
0 wk
21 Apr
4 Jul
1 wk after
Spearmint
Mentha spicata
23 Jan – 20 Feb
19 May
8-12 wk
17 Apr
14 Jul
0 wk
22 May
4 Jul
5 wk after
Coriander
Coriandrum sativum
17 Apr
13 Aug
0 wk
8 May
3 Aug
3 wk after
Garden sage
Salvia officinalis
14 – 28 Feb
4 May
8-10 wk
25 Apr
29 Jun
1 wk after
Common thyme
Thymus vulgaris
6 – 20 Feb
9 May
8-10 wk
17 Apr
4 Jul
0 wk
Oregano
Origanum vulgare
20 Feb – 6 Mar
23 May
6-8 wk
17 Apr
4 Jul
0 wk
22 May
24 Jun
5 wk after
Parsley
Petroselinum crispum
20 Feb – 6 Mar
23 May
6-8 wk
17 Apr
4 Jul
0 wk
21 Apr
24 Jun
1 wk after
Rosemary
Salvia rosmarinus
17 Jan – 14 Feb
5 Apr
10-14 wk
25 Apr
14 Jun
1 wk after

Annual flowers

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Morning glory
Ipomoea tricolor
Fleece
16 – 23 Apr
24 Apr
3-4 wk
14 May
15 May
4 wk after
Cornflower
Centaurea cyanus
17 Apr
14 Jul
0 wk
21 Apr
4 Jul
1 wk after
Statice
Limonium sinuatum
5 – 19 Mar
27 Mar
8-10 wk
14 May
22 May
4 wk after
Sweet William
Dianthus barbatus
20 Feb – 6 Mar
6-8 wk
17 Apr
0 wk
3 May
2 wk after
Snow-on-the-mountain
Euphorbia marginata
19 Mar – 2 Apr
10 Apr
6-8 wk
14 May
22 May
4 wk after
30 Jun
11 wk after
Pinnate dahlia
Dahlia × pinnata
11 – 25 Mar
24 Apr
6-8 wk
6 May
5 Jun
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
27 Mar – 24 Apr
8 May
4-8 wk
22 May
5 Jun
5 wk after
22 May
26 May
5 wk after
Foxglove
Digitalis purpurea
6 – 20 Feb
8-10 wk
17 Apr
0 wk
8 May
3 wk after
Busy lizzie
Impatiens walleriana
7 Mar – 4 Apr
5 May
8-12 wk
30 May
30 Jun
6 wk after
Creeping zinnia
Sanvitalia procumbens
19 Mar – 2 Apr
20 Apr
6-8 wk
14 May
1 Jun
4 wk after
Hyacinth bean
Dolichos lablab
Season too short
2 – 16 Apr
4-6 wk
14 May
4 wk after
Chinese lantern
Physalis alkekengi
14 – 28 Feb
19 Apr
8-10 wk
25 Apr
14 Jun
1 wk after
Love in a mist
Nigella damascena
17 Apr
29 Jun
0 wk
21 Apr
19 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
19 Mar – 2 Apr
31 Mar
6-8 wk
14 May
4 wk after
30 Jun
11 wk after
Purple-top vervain
Verbena bonariensis
31 Jan – 28 Feb
19 Apr
8-12 wk
25 Apr
14 Jun
1 wk after
Cardoon
Cynara cardunculus
19 Feb – 19 Mar
20 Mar
8-12 wk
14 May
15 May
4 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
7 Feb – 7 Mar
10 Apr
8-12 wk
2 May
5 Jun
2 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
7 – 21 Mar
24 Apr
6-8 wk
2 May
5 Jun
2 wk after
Corn poppy
Papaver rhoeas
17 Apr
14 Jul
0 wk
21 Apr
4 Jul
1 wk after
Snapdragon
Antirrhinum majus
23 Jan – 20 Feb
9 May
8-12 wk
17 Apr
4 Jul
0 wk
3 May
24 Jun
2 wk after
Flossflower
Ageratum houstonianum
21 Mar – 4 Apr
6 Apr
8-10 wk
30 May
1 Jun
6 wk after
Sweet pea
Lathyrus odoratus
20 Feb – 13 Mar
30 May
5-8 wk
17 Apr
4 Jul
0 wk
Stock
Matthiola incana
20 Feb – 6 Mar
2 Jun
6-8 wk
17 Apr
14 Jul
0 wk
8 May
4 Jul
3 wk after
Wormwood
Artemisia absinthium
20 Feb – 6 Mar
3 May
6-8 wk
17 Apr
14 Jun
0 wk
8 May
4 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
21 Mar – 4 Apr
3 May
4-6 wk
2 May
31 May
2 wk after
Garden pansy
Viola × wittrockiana
6 – 20 Feb
19 May
8-10 wk
17 Apr
14 Jul
0 wk
3 May
4 Jul
2 wk after
Petunia
Petunia
19 Feb – 19 Mar
27 Mar
8-12 wk
14 May
22 May
4 wk after
Sweet Scabious
Scabiosa atropurpurea
28 Feb – 14 Mar
3 May
6-8 wk
25 Apr
14 Jun
1 wk after
5 Jun
7 wk after
Common zinnia
Zinnia elegans
2 – 16 Apr
17 Apr
4-6 wk
14 May
15 May
4 wk after
Common morning glory
Ipomoea purpurea
Fleece
9 – 23 Apr
24 Apr
3-5 wk
14 May
15 May
4 wk after
Garden cosmos
Cosmos bipinnatus
2 – 16 Apr
8 May
4-6 wk
14 May
5 Jun
4 wk after
5 Jun
7 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
7 Mar – 4 Apr
9 Apr
8-12 wk
30 May
4 Jun
6 wk after
Bee balm
Monarda didyma
23 Jan – 20 Feb
19 Apr
8-12 wk
17 Apr
14 Jun
0 wk
22 May
4 Jun
5 wk after
Yarrow
Achillea millefolium
20 Feb – 6 Mar
3 Apr
6-8 wk
17 Apr
15 May
0 wk
8 May
3 wk after
Safflower
Carthamus tinctorius
17 Apr
14 Jun
0 wk
21 Apr
4 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
20 Feb – 6 Mar
23 May
6-8 wk
17 Apr
4 Jul
0 wk
30 Mar
24 Jun
3 wk before
Bishop's flower
Ammi majus
6 – 20 Mar
6 Jun
4-6 wk
17 Apr
4 Jul
0 wk
8 May
24 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Fleece
19 Feb – 5 Mar
7 Mar
10-12 wk
14 May
16 May
4 wk after
Sunflower
Helianthus annuus
16 – 23 Apr
13 Jun
3-4 wk
14 May
4 Jul
4 wk after
22 May
24 Jun
5 wk after
China aster
Callistephus chinensis
19 Mar – 2 Apr
2 Jun
6-8 wk
14 May
14 Jul
4 wk after
5 Jun
4 Jul
7 wk after
Annual phlox
Phlox drummondii
7 – 21 Mar
20 Apr
6-8 wk
2 May
1 Jun
2 wk after
5 Jun
7 wk after
Hollyhock
Alcea rosea
20 Feb – 6 Mar
6-8 wk
17 Apr
0 wk
8 May
3 wk after
Alpine delphinium
Delphinium elatum
23 Jan – 20 Feb
19 Apr
8-12 wk
17 Apr
14 Jun
0 wk
22 May
4 Jun
5 wk after
African marigold
Tagetes erecta
19 Mar – 2 Apr
20 Apr
6-8 wk
14 May
1 Jun
4 wk after
Black-eyed Susan
Rudbeckia hirta
28 Feb – 14 Mar
23 May
6-8 wk
25 Apr
4 Jul
1 wk after
5 Jun
24 Jun
7 wk after
Wood sage
Salvia nemorosa
6 – 20 Feb
9 Apr
8-10 wk
17 Apr
4 Jun
0 wk
22 May
25 May
5 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
5 Mar – 2 Apr
3 Apr
6-10 wk
14 May
15 May
4 wk after
California goldenpoppy
Eschscholzia californica
17 Apr
14 Jul
0 wk
21 Apr
4 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
5 – 19 Mar
9 May
8-10 wk
14 May
4 Jul
4 wk after
Water forget-me-not
Myosotis scorpioides
20 Feb – 6 Mar
3 May
6-8 wk
17 Apr
14 Jun
0 wk
8 May
4 Jun
3 wk after